Modeling a stadium dome with UVs?
This is a very easy thing to make in Blender.
Step one- Take a sphere and select the bottom half faces, then delete that part.
You can now scale the top half of the sphere on the Z axis to look slightly less spherical.
Step two- In Edit Mode select the bottom-most edges of the half-sphere and press E then Z to extrude it down on the Z axis, then type &quot;-.1&quot; to move the extruded part down just a bit, then press Enter/return
Step three- Before doing anything else, press Shift+R to repeat the action. This will extrude another part 0.1 down the Z axis off of the already extruded part. For reference, Shift+R is the hotkey you use in Blender to repeat the previous action.
Image of result for reference:

This should get the result you want.
EDIT If you want to unwrap a UV texture to your model, then you have to give the object a material, and add an image texture with the image you want to the color input of the material node.